1 /* $NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $ */
2
3 /*-
4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Emmanuel Dreyfus
17 * 4. The name of the author may not be used to endorse or promote
18 * products derived from this software without specific prior written
19 * permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35
36 __KERNEL_RCSID(0, "$NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $");
37
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/signal.h>
41 #include <sys/fcntl.h>
42 #include <sys/filedesc.h>
43
44 #include <machine/types.h>
45
46 #include <sys/syscallargs.h>
47
48 #include <compat/netbsd32/netbsd32.h>
49 #include <compat/netbsd32/netbsd32_syscallargs.h>
50
51 #include <compat/linux/common/linux_types.h>
52 #include <compat/linux/common/linux_fcntl.h>
53 #include <compat/linux/common/linux_machdep.h>
54 #include <compat/linux/common/linux_misc.h>
55 #include <compat/linux/common/linux_ipc.h>
56 #include <compat/linux/common/linux_sem.h>
57 #include <compat/linux/linux_syscallargs.h>
58
59 #include <compat/linux32/common/linux32_types.h>
60 #include <compat/linux32/common/linux32_fcntl.h>
61 #include <compat/linux32/common/linux32_signal.h>
62 #include <compat/linux32/common/linux32_machdep.h>
63 #include <compat/linux32/linux32_syscall.h>
64 #include <compat/linux32/linux32_syscallargs.h>
65
66 struct linux32_flock {
67 short l_type;
68 short l_whence;
69 int32_t l_start;
70 int32_t l_len;
71 linux_pid_t l_pid;
72 };
73
74 struct linux32_flock64 {
75 short l_type;
76 short l_whence;
77 netbsd32_int64 l_start;
78 netbsd32_int64 l_len;
79 linux_pid_t l_pid;
80 };
81
conv_linux_flock(linux32,flock)82 conv_linux_flock(linux32, flock)
83 conv_linux_flock(linux32, flock64)
84
85 int
86 linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval)
87 {
88 /* {
89 syscallarg(const netbsd32_charp) path;
90 syscallarg(int) flags;
91 syscallarg(int) mode;
92 } */
93 struct linux_sys_open_args ua;
94
95 NETBSD32TOP_UAP(path, const char);
96 NETBSD32TO64_UAP(flags);
97 NETBSD32TO64_UAP(mode);
98
99 return linux_sys_open(l, &ua, retval);
100 }
101
102 /*
103 * The linux support for 64bit file offsets introduced both an fcntl64()
104 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function
105 * can still be passed LINUX_F_GETLK (etc).
106 * In practice this means that the two functions are identical!
107 *
108 * We have to intercept both sets of locking primitives because the
109 * structure layout of the 64bit version differs from that on amd64 due
110 * to extra padding because the alignment constraint for int64_t differs.
111 */
112
113 int
linux32_sys_fcntl(struct lwp * l,const struct linux32_sys_fcntl_args * uap,register_t * retval)114 linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval)
115 {
116 /* {
117 syscallarg(int) fd;
118 syscallarg(int) cmd;
119 syscallarg(netbsd32_voidp) arg;
120 } */
121 struct linux_sys_fcntl_args ua;
122 int cmd = SCARG(uap, cmd);
123
124 switch (cmd) {
125 case LINUX32_F_GETLK64:
126 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
127 linux32, flock64);
128 case LINUX32_F_SETLK64:
129 case LINUX32_F_SETLKW64:
130 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
131 linux32, flock64, LINUX_F_SETLK64);
132 case LINUX32_F_GETLK:
133 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
134 linux32, flock);
135 case LINUX32_F_SETLK:
136 case LINUX32_F_SETLKW:
137 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
138 linux32, flock, LINUX_F_SETLK);
139 default:
140 break;
141 }
142
143 NETBSD32TO64_UAP(fd);
144 SCARG(&ua, cmd) = cmd;
145 NETBSD32TOP_UAP(arg, void);
146
147 return linux_sys_fcntl(l, &ua, retval);
148 }
149
150 #ifdef LINUX32_SYS_fadvise64
151 int
linux32_sys_fadvise64(struct lwp * l,const struct linux32_sys_fadvise64_args * uap,register_t * retval)152 linux32_sys_fadvise64(struct lwp *l,
153 const struct linux32_sys_fadvise64_args *uap, register_t *retval)
154 {
155 /* {
156 syscallarg(int) fd;
157 syscallarg(uint32_t) offlo;
158 syscallarg(uint32_t) offhi;
159 syscallarg(netbsd32_size_t) len;
160 syscallarg(int) advice;
161 } */
162 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);
163
164 return do_posix_fadvise(SCARG(uap, fd), off,
165 SCARG(uap, len), linux_to_bsd_posix_fadv(SCARG(uap, advice)));
166 }
167 #endif
168
169 int
linux32_sys_fadvise64_64(struct lwp * l,const struct linux32_sys_fadvise64_64_args * uap,register_t * retval)170 linux32_sys_fadvise64_64(struct lwp *l,
171 const struct linux32_sys_fadvise64_64_args *uap, register_t *retval)
172 {
173 /* {
174 syscallarg(int) fd;
175 syscallarg(uint32_t) offlo;
176 syscallarg(uint32_t) offhi;
177 syscallarg(uint32_t) lenlo;
178 syscallarg(uint32_t) lenhi;
179 syscallarg(int) advice;
180 } */
181 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);
182 off_t len = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo);
183
184 return do_posix_fadvise(SCARG(uap, fd), off,
185 len, linux_to_bsd_posix_fadv(SCARG(uap, advice)));
186 }
187